Sections and keys

Default value

Other values

Description

[Codec]

Section about the codec (compressorr/decompressor)

Enabled

1

0 = Disabled
1 = Enabled

Enable/Disable the codec

SysFourCC

mjpg

System FourCC of the codec

[Compress]

Section about the compressor

Mode

0

0 = Integer
1 = Fast Integer
2 = Float

Precision used for DCT processing

MMXAllowed

1

0 = Disabled
1 = Enabled

Allow the use of MMX instruction set (valid only if MMX is detected)

3DNowAllowed

1

0 = Disabled
1 = Enabled

Allow the use of 3DNow! instruction set (valid only if 3DNow! is detected)

SupportInterleave

1

0 = Disabled
1 = Enabled

If disabled, decompress and display only 1 field per frame.

(Frame height need to be more than 288)

InvertFieldOrder

0

0 = Disabled
1 = Enabled

Odd lines become even lines and even lines becomes odd lines. (Frame height need to be more than 288, SupportInterleave need to be set)

Enabled

1

0 = Disabled
1 = Enabled

Enable/Disable the compressor

UserFourCCVal

dmb1

FourCC value

User defined FourCC

UserFourCC

0

0 = Disabled
1 = Enabled

Enable/Disable use of User defined FourCC.

EmitAPP0_AVI1_14

0

0 = Disabled
1 = Enabled

Enable/Disable the output of a 14 bytes lenght APP0_AV1 marker  (This is a non-standard length used by some M-JPEG hardware encoders)

CheckDataRate

1

0 = Disabled
1 = Enabled

Enable/Disable data rate checking.

If disabled, ignore the dwFrameSize parameter of ICCompres function, only uses dwQuality parameter.

If enabled, perform a more accurate but slower data rate checking.

If enabled, ignore the dwFrameSize and thedwQuality parameters of ICCompres function, uses ForcedQualityValue  instead.

[Decompress]

Section about the decompressor

Mode

0

0 = Integer
1 = Fast Integer
2 = Float

Precision used for DCT processing

FancyUpsampling

0

0 = Disabled
1 = Enabled

If enabled, do careful upsampling of chroma components. If disabled, a faster but sloppier method is used.  The visual impact of the sloppier method is very very small.

MMXAllowed

1

0 = Disabled
1 = Enabled

Allow the use of MMX instruction set (valid only if MMX is detected)

3DNowAllowed

1

0 = Disabled
1 = Enabled

Allow the use of 3DNow! instruction set (valid only if 3DNow! is detected)

SMPAllowed

1

0 = Disabled
1 = Enabled

Enable/Disable use of the SMP optimized mode. If enabled, decompress the first field with the first processor while decompressing the second field with the second processor. (valid only if a SMP capable system is detected)

SupportInterleave

1

0 = Disabled
1 = Enabled

If disabled compress and srore only the first field.

(Frame height need to be more than 288)

InvertFieldOrder

0

0 = Disabled
1 = Enabled

Odd lines become even lines and even lines becomes odd lines. (Frame height need to be more than 288, SupportInterleave need to be set)

Enabled

1

0 = Disabled
1 = Enabled

Enable/Disable the decompressor

FixSOF0

1

0 = Disabled
1 = Enabled

Enable/Disable dymanic fix of invalid SOF0 markers (produced by some non-standard M-JPEG hardware encoders)

FixSOS

1

0 = Disabled
1 = Enabled

Enable/Disable dymanic fix of invalid SOS markers (produced by some non-standard M-JPEG hardware encoders)

FixDQT

1

0 = Disabled
1 = Enabled

Enable/Disable dymanic fix of invalid DQT markers (produced by some non-standard M-JPEG hardware encoders)

IF09

0

0 = Disabled
1 = Enabled

Enable/Disable IF09 output mode support (Disabled because color subsampling of this mode is too destructive)

DoubleWidthIf43

0

0 = Disabled
1 = Enabled

Enable/Disable width doubling mode if resulting aspect ratio is near from 4:3

FixDRI

0

0 = Disabled
1 = Enabled

Enable/Disable dymanic fix of invalid DRI markers (produced by some non-standard M-JPEG hardware encoders)

FixMarkerLen

0

Length of DRI

Define the length of the restart interval, bypass the DRI marker (FixDRI need to be enabled)

DS_Mode

1009

1009 = Normal
1010 = Full2CIF

Enable/Disable internal Full to CIF mode (DirectShow only)

DS_CIFWidth16

1

0 = Disabled
1 = Enabled

Enable/Disable alignment of width on 16 bytes (DirectShow only, DS_Mode need to be enabled)

DS_CIFHeight16

1

0 = Disabled
1 = Enabled

Enable/Disable alignment of height on 16 bytes (DirectShow only, DS_Mode need to be enabled)

DS_ForceYUY2

1

0 = Disabled
1 = Enabled

If enabled, force the output format to be YUY2. (DirectShow only)

DS_NoSkip

1

0 = Disabled
1 = Enabled

If enabled, the decompressor won't skip any frame even if it is out of sync. (DirectShow only)

(IJG : Independent JPEG Group).